What activities can you recommend for a four month old?

Bath time play! At this point, babies usually are more into observing things around them and want to almost touch anything. It may also mean that they are already beginning to control their movements. So during bath time, you can play with your baby by blowing bubbles where he/she can see and try to touch. This way, it helps his/her eye and hand coordination. It is also a form of exercise for your baby. Just a friendly reminder to use soap that has no-tear formula.